49970640 has 80 divisors (see below), whose sum is σ = 157579200. Its totient is φ = 13095936.

The previous prime is 49970629. The next prime is 49970647. The reversal of 49970640 is 4607994.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49970647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12396 + ... + 15924.

It is an arithmetic number, because the mean of its divisors is an integer number (1969740).

Almost surely, 2^49970640 is an apocalyptic number.

49970640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49970640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78789600).

49970640 is an abundant number, since it is smaller than the sum of its proper divisors (107608560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49970640 is a wasteful number, since it uses less digits than its factorization.

49970640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604 (or 3598 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 49970640 is about 7068.9914415000. The cubic root of 49970640 is about 368.3310269688.

The spelling of 49970640 in words is "forty-nine million, nine hundred seventy thousand, six hundred forty".